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R12 to r134a conversion of Technology

【PREMIUM QUALITY】 The R12 R22 R502 to R134A fast qu.

Buy R134A AC Oil Injector Tool Kit, R134A Refrigerant Charging Hose with Gauge, Compressor Oil Dye Injector with Low Side Quick Coupler, R12 to R134A Conversion Adapter for R134A Air Conditioner System: Air Conditioning Line Repair Tools - Amazon.com FREE DELIVERY possible on eligible purchasesLearn the basic steps and tips to convert your R12 system to 134a, a compatible and legal refrigerant for most cars and trucks. Find out what parts and tools you need, …Replace the lines with barrier hose rated for R134A. R12 lines are rumored to leak R134a not sure how true that is but it's cheap insurance. Replace the O-Rings with R134a compatible parts. Replace the Low Pressure Cutout Switch with one calibrated for R134a.Jan 6, 2021 · Buy gohantee R12 R22 R502 Screw to R134A Fast Conversion Adapter Valve, R12 to R134A Conversion Kit, Adapter Switch R12 R22 R502 to R134A Quick Connector, High/Low Side 1/4" SAE (7/16"-20 Thread) Ports: Air Conditioning Line Repair Tools - Amazon.com FREE DELIVERY possible on eligible purchasesOEM Partner: ConversionAir Kits. Steinbach & Associates' ConversionAir Kits are engineered for efficient and accurate conversion of current R-12 aviation cooling systems to new industry R134a systems. R12 Freon has gone out of production, hybrid blends of Freon have been rejected by OEMs and compressor manufacturers, and certifying exotic ...This item: R1234YF to R134A Adapter, Low Side Quick Coupler Conversion Kit, R12 to R134A AC Charging Hose Adapter Fitting Connector Refrigerant Can Adapter Valve for R1234YF/R12 to R134A Car Air-Conditioning . $8.99 $ 8. 99. Get it as soon as Wednesday, May 22. In Stock.The guy finally showed me a kit to convert form R134a to R12a, which has a moisture remover can, a sealant can, and a R12a can. With this kit, I'm supposed to be able to do the conversion without any problem. I'll give it shot tomorrow, and let you guys know how it went. ´69 Mustang Coupe & now also a 95 GT.R12 to R134a Conversion. Working on my late Father's 88 Camry 4 cylinder so we can sell it. Currently R12 with a locked up pump. Keeping costs low as possible. Bought a working used pump and have R12. Would like to save it though and convert to R134a. Going to replace the receiver/dryer and orings. Orifice tube if it has one.The Oldsmobile Cutlass R134a Conversion Kits from Classic Auto Air. High performance / High efficiency Truck AC systems & parts.You can get R12 replacements, or just compressed duster air cans, some of which are HFC-134a (so, R134a by a different name), while others are R152A. Both tend to be cheaper than R134a sold for refrigerant purposes, and any of those will be cheaper than R12. You can look up the tables for the pressures for those, but I'm going with R134a here.Switching from R12 to R134a makes the most economic sense when your A/C system needs major repairs such as a new A/C evaporator, A/C condenser, or A/C compressor. The cost of switching refrigerants normally do not add much to the total repair bill. It is fairly easy to convert vintage cars from the 1990s to R134a.Empty the 12 from the system. Go down to autozone and by the R134a conversion kit (34.99) and follow the instructions. To charge it: Connect to the LOW SIDE ONLY. Jump the clutch to activate it and charge that way. When you're down place the sticker on the vehicle and you now have a legally converted R134a system.It was 90 degrees outside today and the air was blowing at 44 degrees on low max compared to 48 three weeks ago. '80-'86 FAQs (Frequently Asked Questions) - A/C Conversion R12 to R134 - I have converted my 1983 f-150 to 134 refrigerant. It does not blow as cold as the r12.Learn the steps to retrofit your pre-1995 vehicle's A/C system from R-12 to R-134a refrigerant, and why this conversion is necessary for environmental reasons. Find out what tools and materials you'll need, and how to check your system for leaks and proper operation.Buy R12 to R134A AC Fitting Adapter Kit, R12 to R134a Conversion Kit, Quick Coupler Valve A/C Fitting, R12 R22 to R134A High/Low Fitting Port 1/4In SAE Conversion Adapter, Pack of 2: Air Conditioning Line Repair Tools - Amazon.com FREE DELIVERY possible on eligible purchasesI bought an R12 to R134a conversion kit from AutoZone to put on a 92' Nissan 240SX. The A/C wasn't cold at all, so I figured it needed to be serviced, but realized that it had the old R12 attachments. So I removed the core valve and of course a little more freon was released, but I didn't use a vaccum pump before I added the conversion stem.[R12 To R134a Conversion Kit Packing Includes] Includes 1 Pc R12 to R134A Retrofit Valve with 1Pc Dust Cap. [R12 To R134a Adapter Compatibility] Switch for automotive air conditioning refrigerant systems converting from R12, R22, R502 to R-134A. Low Side Connection: 1/4Inch SAE (7/16''- 20) x 13 mm; Max Thread: 1/4Inch Thread; Min Thread: 8v1 ...If you need to convert R12 to R134A, there are a few things you'll need to know. First, you'll need to figure out the percentage of R12 that needs to be converted. Second, you'll need to find a converter that can do the conversion for you. Third, you'll need to have the correct tools and supplies on hand in order to complete the conversion.Retrofit Notes in video; note that I was initially backwards in the direction of closing/opening the blue(low) and red(high) side service adapters on the ser...Classic Auto Air is your source for Model Specific A/C kits for 80’s & older Ford, GM, Mopar, Porsche, Custom Street Rods & more.Steinbach & Associates ConversionAir Kits are engineered for efficient and accurate conversion of current R-12 aviation cooling systems to new industry R134a systems. ... Kit feature high quality R134a compatible components that will give better or equivalent cooling effects than the older R12 systems. Key components include special R134a ...Classic Auto Air is your source for Model Specific A/C kits for 80’s & older Ford, GM, Mopar, Porsche, Custom Street Rods & more.You can do most of the conversion yourself. You will need a certified a/c repair shop to evacuate and flush the system before the conversion. You will also need them to fill the system with R134A. You can do the conversion yourself if you understand how an a/c system operates in your Corvette and are a competent home mechanic.Converting Air Conditioning to R-134 By Rob - [email protected] (Editor's note: Please read this article on Refrigerant Recovery.)I have a 1990 Miata which I wanted to convert to R-134a from R-12. I bought a rebuilt compressor (w/ clutch) from Advance Auto Parts which cost me $350 with a $10 core charge (I kept my factory compressor because I might as well rebuild it as get back a lousy 10 ...The one significant concern with the R-134a conversion on an XJ-S is. that the condenser will run hotter with R-134a than it did with R12, and in fact may overheat. When a condenser overheats, the result is. skyrocketing high side pressures (just look at the chart; a few.R134a, low side . Notes: Low side, 1/4 in. (7/16-20 in.) x 13mm retrofit straight adapter. Quantity: Sold individually. ... including these quality air conditioning retrofit service port adapters. They are designed for use in converting R12 A/C charging port fittings to accept R134a hoses with 13mm and 16mm quick-disconnects. These refrigerant ...Multiply the R12 charge listing by 0.9 if its unit of measurement is pounds. Subtract what you get by 0.25lbs to arrive at the required R134a charge. This is how the calculation will be assuming that the R12 charge listing is 2.5lbs: Step 1: R134a Charge Level = (R12 Charge Listing × 0.9) - 0.25lbs. Step 2: (2.5lbs × 0.9) - 0.25lbs.Converting R12 to R134. I ordered a set of adapters that are supposed to adapt the R12 fittings to new style. Well they don’t fit, no surprise I guess. Maybe the high side will fit as it screws out so maybe the new one will screw in but the low side looks like it is made on the line so not sure what is supposed to be done there.R134a is NOT less efficient than R12 – Actually R134a is more efficient. Pound for pound R134a is a more efficient refrigerant than R12, however it runs at higher pressures in some aspects and therefore requires more effective condensing. Whether R134a performs as well as R12 in any given a/c system depends upon system components and the ...We therefore offer a R12 ro R134a conversion service. R12 was phased out and made illegal in the 1990's, due to it's ozone depleting properties, and replaced with r134a, which itself is now being replaced with the newer r1234yf. However, r134a is widely available and much cheaper to use than the very new r1234yf so we would suggest ...Add the proper oil to the compressor. Replace the drier. Tighten all the connections and add the new fittings. Now take the car back to the person who evacuated the R12 and have them pull a vacuum on the system for at least half and hour. Finally you add the correct amount of refrigerant by weight and add the label.R12 to R134a Conversion Kit, R12 to R134a AC Retrofit Fitting Adapter Kit, High/Low Pressure R12 to R134a Retrofit Kit with 1/4'' Female to 7/16"-20 UNF Connection, for Auto A/C Refrigerant System-2. 4.6 out of 5 stars. 14. $9.99 $ 9. 99. Buy 3, save 5%. FREE delivery Mon, Mar 18 on $35 of items shipped by Amazon.R12 To R134a Retrofit A/C System Cap Valve Kit. These Low/High side retrofits will convert your old 3/16inch or 1/4inch R12 charging port and allows you to connect the R134a hose. Good for car accessory replacement. Specification: Type: A/C Charging Port Adapter. Material: Metal and Plastic. Universal Fitment = YES. Package content:The conversion option that gives convertible bonds their name ensures that when the bond-issuing company's stock price becomes more attractive, you may convert the bond into stock....The Porsche 964 R134a Conversion Deluxe Kit by Kuehl includes. Kuehl receiver drier, XH9 type desiccant, compatible with R134a and R12 refrigerants. Low and High Side R134a charge port adapters with their own valve core (our solid steel body with its own valve core is superior to inexpensive aluminum types) 8 ounce can of polyoester ("Ester") oil.Easy to use kit, includes everything needed to recharge an automotive A/C system or retrofit from R-12 to R-134a. Includes three cans of High Mileage R-134a with Oil and How-To CD. Comes with reusable trigger dispenser with built-in gauge and temperature dial indicator. Includes retrofit valves needed to convert the high and low-pressure ports ...Retrofitting R12 to R134a by Classic Auto Air. Classic Auto Air is your source for Model Specific A/C kits for 80’s & older Ford, GM, Mopar, Porsche, Custom Street Rods & more.Jul 6, 2012 · The A/C system in many older vehicles needs to be converted from R12 refrigerant to R134a refrigerant. This video shows you how to convert your vehicle's A/C...Bonus - no need to vacuum/dry the system or drain old oil. R12a is best filled at an atmospheric charge, works best in systems with a bit of moisture, and has far larger molecule size than R134a - minimizes leaks. Performance wise - it's close to R12, and quite a bit better than R134a. Lower head temperatures to boot.R12 to R134a Conversion Kit, 1Pair R12 to R134a Convert Adapters, R12 to R134A AC Retrofit Fitting Adapter Kit, R12 to R134a Adapter Fittings, Fits for Car AC Air Conditioner Refrigerant System. 4.3 out of 5 stars. 14. 50+ bought in past month. $9.99 $ 9. 99. Save 3% on 2 select item(s)Aug 1, 2011 · High-Side Discharge Port. We took our ’87 Ford F-250 to an A/C shop that had R-134a adapters, which also fit our smaller R-12 ports. On our truck, the high-pressure side port was located on the ...Jan 2, 2012 · The key to the conversion is to find/fix any leaks that caused the R12 to leak out, R134A is smaller and will leak from a very small R12 leak. Actually, keeping the old condenser will yield a better cooling effect over a 134A condenser. New drier, new compressor and orifice tube a good flush, good vacuum and recharge it should be trouble free.Today I convert my 1990 Mazda Miata from the old R12 AC system to the more modern R134a system from a 1996 Mazda Miata. This video covers everything under th...The formula is this: R-12 amount x 90% - 1/4 lb. = R-134a amount. In the F-body system, 48 ounces of R-12 are used (3 pounds). Thus, applied to the formula: 48 x .9 - .25lb (.25lb is 4 oz.) = 39.2 ounces of R-134a. Obviously, if you are doing this yourself, 39.2 is an unrealistic number. I put in 40 ounces, which was easy because of the ...Changing the desiccant to XH-7 is usually recommended if an R-12 system is converted to R-134a. The desiccant should also be replaced if a blend contains R-22 because R-22 is not compatible with XH-5 or XH-7 desiccant. The recommended desiccant in this case would be XH-9.It might be time to convert your R12 AC system to R134a. R12 refrigerant is no longer manufactured, and the supplies are limited, leading to an increase in its price. On the other hand, R134a refrigerant is more affordable, readily available, and environmentally friendly. In this blog post, we will take you through the four steps to convert ...Buy R12 to R134a Conversion Kit, 1Pair R12 to R134a Retrofit Adapters, R12 to R134A AC Retrofit Fitting Kit, R12 to R134a Convert Adapter, for Converting R12 R22 Service Port to R134a Service Port: Air Conditioning Line Repair Tools - Amazon.com FREE DELIVERY possible on eligible purchasesPart No. AC995. Warranty Details ( 30 DAY REPLACEMENT IF DEFECTIVE) Product Features: 1 - 7/16" Low-side retrofit valve. 1 - 3/8" High-side retrofit valve. 1 - 7/16" High-side retrofit valve. 1 - 2 piece GM High-side retrofit valve. 2 - Protective caps (High and Low Side) EPA Required Retrofit Label.Includes retrofit valves needed to convert the high and low-pressure ports from R-12 to R-134a and EPA-approved label ; ... I stopped after 2 cans (even though I expected to use all 3 cans and perhaps a fourth since my R12 fill was 44 oz. and I expected my R134a fill to be 35 oz) since the pressure gauge was entering the orange part of the ...【PREMIUM QUALITY】 - R12 to R134A retrofit fast conversion adapter kit are made of high quality metal and plastic, solid construction for high heat resistance, durability and safety. 【A/C VALVE CORES】-Applies to the replacement refrigerant valve core leak.These accessories can bear the oil, bear the impact, bear the corrosion ...Our '89 was converted to R134A in 2004, and it still cools just fine. I continued to run R12 in the '91 and couldn't tell any difference between them. Last September, the compressor went out on the '91, so I had it converted to R134A too. Summer days can get pretty hot here, but the humidity is definitely lower than Florida.5.3K. 641K views 9 years ago. Retrofitting AC systems is something that has been done for many years now. In 1996 systems were switched over to R134a from R12 …Apr 9, 2005. Jun 10, 2005. #6. I just did the conversion on my 86 T-type... Bought 4 cans of R134a @ $12.99ea, and a R134a oil charge/conversion kit for $19.99 at Autozone. Borrowed a buddy's vac pump & guages, sucked it down for 1.5 hours @ 30hg. This (so I'm told) will boil the oil and any moisture from the system.Hi All, I have a 1991 Chevrolet K1500 which I want to convert from R-12 to R-134a as the A/C blows warm and the R12 is hard to service especially if dye needs to be added to source a leak which this truck may or may not have. I was told by a mechanic to convert it over to the newer freon as... The R134a just doesn't really begin to match the R12It might be time to convert your R12 AC system to R134a. Step 2. Open the engine compartment of y

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My old R12 system is very likely complete.

When visiting another country, dynamic currency conversion allows you to pay in your home currency. Here's why you shouldn't use it. You're visiting another country and making a pu...In order for it to work properly, the conversion must be complete. It requires a change of all components; compressor, dryer, all hoses and o-rings. The reason is that R134 has a smaller molecular structure than R12 and if all components are not changed, it will leak out in short order. I obtained my kit from an ebay source.A/C R12 to R134a Conversion. 1/21 - My Schrader Valve was leaking on the original A/C Compressor which I tried tightening but it wouldn't tighten anymore, So I figured if I had to replace the Schrader valve, that I might as well replace everything LOL. I also wanted to redo an A/C Hose and an A/C hard line to better fit around the Supercharger ...Many investors convert traditional IRA accounts into Roth IRA accounts in order to benefit from low tax rates. However, a Roth conversion will result in taxable income. Making part...Old R12 refrigerant lines are usually soaked in old R12 oil, and are "mostly" impermeable to R134a molecules, which are MUCH smaller and will leak through newly manufactured R12 type hoses. In fact, it's probably hard to find real "R12 type" hoses, as everyone has added a barrier in refrigerant hose to prevent R134a molecule seepage.Economically converts A/Cs from R12 to R134a without flushing. No need to flush (unless there has been a major component failure) No need to open the system. The perfect solution to keep the A/C working on older & classic vehicles. Contains Leak Stop 1 to heal and prevent small leaks in elastometric components.Similar to the warm-up before the full sprint, a micro-conversion is a necessary step in your buyer's journey. Learn what exactly micro-conversions are, why they matter, and how to...Apr 5, 2020 · The only mechanical differences between an R12 system and an R134a system are that R134a systems mostly have larger condensers and are more strong compressors. This is mainly because R134a doesn’t cool down as well and quickly and needs a larger space to dissipate heat and is charged to higher pressures.Buy VOSAREA R12 to R134A Adapter Conversion Kit, R134A Retrofit Kit 1/4 Inch High Side Low Side AC Fitting Port A/Car Charging Port Adapter Fittings: Air Conditioning Line Repair Tools - Amazon.com FREE …Learn what is AC, how it works, and why you need to convert your old R12 refrigerant to R134a. Find out the costs, steps, and benefits of retrofitting your car AC system.FULL DESCRIPTION: R12 TO R134 CONVERSION R12 TO R134A CONVERSION A/C EFF. 1-122 THIS SB IS A FULL CONVERSION. RELEASED 3-27-00 LB REV 1 RELEASED 5-21-02. JB. Each delivered OEM part will meet the original manufacturer's specification or, if the part is not an OEM part, it will meet or exceed the original manufacturer's specification.Posts: 3,549. Baffled by R134 adapter connectors. i purchased the pictured "kit" to convert my R12 connections to 134 but I can't for the life of me figure out how these work. 1 and 2 have valve systems inside, 3/4 are identical as far as i can tell and are hollow but have internal threads.WIDE COMPATIBILITY --- R12 R22 R502 screw to R134A fast quick conversion adapter switch for automotive air conditioning refrigerant systems converting from R12, R22, R502 to R-134A. PREMIUM QUALITY --- The A/C retrofit valve with blue dust cap convert is made of high quality brass alloy and plastic material to last under extreme conditions and ...2001 Audi TT Quattro. 1973 Porsche 914-4 1.7. 964 A/C Conversion from R12 to R134. I need to convert my '91 C2 from R12 to R134...it is getting really hot here and I need to charge my A/C. The fittings on the compressor are easy, what I am unsure about is the Hi-Low pressure switch. No one has been able to definitively say that the switch must ...R12 to R134a Convert Adapter : Our low/high side r12 to r134a convert adapter can convert your old 1/4'' SAE or 7/16"-20 UNF R12 R22 charging port for fiting r134a quick charge hose, nice tool for automotive air conditioning refrigerant systems. High Quality : Our r12 to r134a retrofit adapters are made of high quality brass material, with ...Buy gohantee R12 R22 R502 Screw to R134A Fast Conversion Adapter Valve, R12 to R134A Conversion Kit, Adapter Switch R12 R22 R502 to R134A Quick Connector, High/Low Side 1/4" SAE (7/16"-20 Thread) Ports: Air Conditioning Line Repair Tools - Amazon.com FREE DELIVERY possible on eligible purchasesSuperior Car Air Conditioner Retrofit Services Start at Just $350.00 . Keepin' Cool shows unwavering dedication to technological prowess, equipping itself to facilitate the intricate substitution of the antiquated R12 gas with a state-of-the-art R12 replacement, dubbed HFC-R134a.We've efficaciously administered a spectrum of retrofit alterations on an array of automotive marvels, inclusive of:R134a to R12 ratios are about 80% wt ratio R134a, by GM (and others) formula, so about 28oz R134a = 1kg R12 ... Hey tedmich - I merged your thread with the template link in it with your previous R12 to R134a conversion thread to get all the info in one place. 2015 RAV4 Limited, AWD, tech pkg, Barcelona red metallic, 115k miles. ...R12 to R134a Charge Conversion Formula (pounds only) A charge level between 75% and 85% is recommended when converting from R12 to R134a refrigerant. If no conversion information is provided, there is an easy formula to calculate the difference in charge level. This works when the R12 charge specification is listed in pounds.Jun 17, 2023 · The conversion formula involves using the weight of the R12 refrigerant and the desired percentage of R134a to calculate the weight of R134a needed for conversion If you have an older vehicle with an AC system that uses R12 refrigerant, you may find it challenging to maintain and service due to the limited availability of R12.Classic Auto Air is your source for Model Specific A/C kits for 80's & older Ford, GM, Mopar, Porsche, Custom Street Rods & more.4. Connect service station R134a and prodThe oil used in R12 and R134a are different and not compatib

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Warranty: Standard : 1 Year or 20,000 Kilometers. Download. Includes all parts needed for retrofitting. More cost effective than R12. Converting to R134 is less harmful for the environment. Compatible with all newer compressions. Converting To R134 Is Less Harmful For The Environment.R22 to R134A Conversion Adapter: Thread: R12 R22 R502 Screw to R134A Fast Conversion Adapter Valve 1/4" SAE to 8 v1 Thread. Using for home air-conditioning and car air-conditioning add refrigerant, applies to the R134A, R12 or R22 interface with highly working performance.CORRECT CHARGE AMOUNT - The typical 134a charge of a factory R12 system is 70-80% of the original R12 charge amount. NOTE - Ignore the sight-glass. A properly charged 134a system will likely show bubbles in the sight-glass. If your sight-glass is clear with a 134a charge, the system is significantly overcharged.Santech R12 to R-134a Coupler Conversion Kit Shop All Santech. Santech952402. Part # MT2164. SKU # 952402. Year Warranty. In-Store Pickup. Select Store. for pickup ...Buy WTPLY R12 to R134a Conversion Kit, R12 to R134a Retrofit Kit, R12 R22 to R134A High and Low Fitting Port 1/4" to 7/16" Conversion Adapter Air Conditioner: Air Conditioning Line Repair Tools - Amazon.com FREE DELIVERY possible on eligible purchasesI have converted my 75 280Z and my 82 280zxt to 134a with great results. Only trouble on the ZX was that I could not get the 134 adapter to fit on the compressor with limited space. I just charged it with an R12 hose. The retrofit kits are great, just be sure to use 70% of the refrigerant that the r12 system required.This kit includes a remanufactured compressor which will operate with R134A Refrigerant, a drier, an evaporator orifice and the oil, seals, fittings and adapters. 1977-82 Corvette R12 to R134 conversion kit has what you need to convert your AC system to R134. Fitment: 1977 Chevrolet Corvette; 1978 Chevrolet Corvette; 1979 Chevrolet CorvetteOEM or Denso TXV R134a spe Part # 4750107 (I considered making this optional but there is a difference in the valves in how much refrigerant the HFC valve allows to flow compared to the R12 valve. You don't have to do this but I HIGHLY recommend do so. I'm not sure if the new valves from Toyota are still R12 or are the R134 valves.Hot shot r-414B is the best replacement for r-12 I've used. works great on ge refrigerators, cars etc. use 80% to volume or if you would normally use 10 oz of r-12 use 8 oz r-414b and you don't have to worry about oil compatability. Reply. 06-15-2004, 08:04 PM #7. jeffcolledge.Learn how to convert your car's old R12 system to R134a using the factory method or the easy method. Find out what parts and supplies you need, how to calculate the retrofit charge, and how to install the port adapters and label.Junkyard Dawg. Minimum requirements for converting a system to R134a. If system has any refrigerant R12 left in the system it must be reclaimed by an approved recovery machine. Accumulator/drier must be replaced with an R134a compatible replacement. Conversion fittings and label must be added to the system.Buy R12 to R134A AC Fitting Adapter Kit, R12 to R134a Conversion Kit, Quick Coupler Valve A/C Fitting, R12 R22 to R134A High/Low Fitting Port 1/4In SAE Conversion Adapter, Pack of 2: Air Conditioning Line Repair Tools - Amazon.com FREE DELIVERY possible on eligible purchasesR134 also requires a slightly higher system pressure than R12, so you will need to use slightly more R134 for the system to cool properly. Sure, it can be done, and is done all the time. Problem is, a lot of people that do this conversion and seem happy with it, don't realize how cold a properly charged a/c system can get.Indices Commodities Currencies StocksBuy Yaocom R12 to R134a Ac Fitting Adapter Kit, R12 to R134a Conversion Ac Retrofit Fitting Adapter Quick Coupler Valve A/c 90° Fitting, High Low Side Retrofit Fits for Car Ac Air Conditioner Refrigerant: Air Conditioning Line Repair Tools - Amazon.com FREE DELIVERY possible on eligible purchasesBuy R12 to R134A AC Fitting Adapter Kit, R12 to R134a Conversion Kit, Quick Coupler Valve A/C Fitting, R12 R22 to R134A High/Low Fitting Port 1/4In SAE Conversion Adapter, Pack of 2: Air Conditioning Line Repair Tools - Amazon.com FREE DELIVERY possible on eligible purchasesDetermine the amount of R-134a refrigerant needed to charge the system by subtracting 50 ml (1-2/3 oz) from the system's R-12 capacity. 8. Charge the system with the proper amount of R-134a refrigerant. 9. Start the engine and let it idle. Turn the A/C system on and off several times.Or $168 for r134a converted. The one issue with r12 that they said was if there was a leak within 2 weeks, to bring it back to check it out. But they would have to charge me to evac and replace the r12. With the r134 they wouldn't charge me again. Probably because it's much cheaper for them to get. I was considering doing an r12 to r134 conversion on a Benz